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Managing Texas Instruments TI-92 Keyboard 



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Managing Texas Instruments TI-92 Keyboard 



Tools used in this guide 

• Phillips #00 Screwdriver (1) 

• Plastic Opening Tools (1) 

• Tweezers (1) 



In this guide we will show you how to access the keyboard. 



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Managing Texas Instruments TI-92 Keyboard 




Step 1 - Back Cover 

• The first step to any repair operation is to 
remove the front cover. 



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• Grab the back of the calculator with one hand and the 
cover with the other. 

• Pull the cover off from one of the sides for easy 
removal. 




Step 2 

• Orientate the calculator with the top facing towards you. 

• Slide the locking tab,found on the top part of the 
calculator, to the unlock position. 



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Managing Texas Instruments TI-92 Keyboard 




Step 3 

• "Locking Tab" 

• To remove the back cover, slide the cover away from 
the locking tab towards the bottom of the calculator until 
the cover no longer slides. 

• Then with the front of the calculator facing down, pull 
up on the back cover. 

• The calculator should now be orientated with the front 
facing down, as shown in picture 2. 




Step 4 - Batteries 

• The Batteries are now exposed and the 
calculator is face down with the back 
towards you. 



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• Remove the bottom batteries by pressing the battery 
towards you while pulling it out from the far end. 

• If you can not do the previous step with your 
finger try using a flat ended tool such as an 
Ipod opening tool. 



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• After the bottom battery has been removed push or 
slide the other(top) battery towards you until it is fully 
exposed in the battery slot. 

• Now simply remove the battery. 



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Managing Texas Instruments TI-92 Keyboard 




Step 5 - repair Back Case 

• Using a Philips Screwdriver #00 unscrew the twelve 
1 1 .8mm screws shown in the picture and located on the 
back of the calculator. 




Step 6 

Unscrew the 19mm screw located near center of the 
back of the calculator. 

• Remove the panel being held by the screw. 



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Managing Texas Instruments TI-92 Keyboard 




Step? 

• Using the same Phillips screwdriver, unscrew the 
remaining three 11.8mm screws. 




Steps 

• Using the Ipod Opening Tool pull up on both sides of 
the rectangular module while keeping the rest of the 
calculator flat on a surface face down 



You may get a lot of resistance from the 
module. Do not use too much force as you 
risk damage. Use small amounts offeree to 
work the module out. 



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Managing Texas Instruments TI-92 Keyboard 




Step 9 

• Pull out the rectangular module when it is finally loose 
enough. 




Step 10 

• Now pull up on the back cover of the calculator while 



holding the rest of it flat on a surface. 

Be careful not to tilt the front of the 
calculator at this point. The keyboard 
buttons are now unsupported and will fall 
out of place. 



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Managing Texas Instruments TI-92 Keyboard 




Step 11 ' Keyboard 

• Here we will use the front panel, separate from the 
motherboard 



• Make sure not to tilt this part unless you 
want to remove all the keys from the face 
plate. 



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• Remove the rubber contact lying on top of the keys. 




Step 12 

• With the rubber contact removed the keys can now be 
removed to be replaced, cleaned, or manipulated in 
other ways. 

To aid the removal of individual keys you can use the 
I pod Opening Tool or preferably a pair of tweezers. 



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Managing Texas Instruments TI-92 Keyboard 




Step 13 

• When placing the keys back into the faceplate you have 
to make sure that they are going in the right direction. 

You can tell which way is up by a semicircular extrusion 
on the back of a key. 

• The gray and blue keys have the extrusion on the 
upper left hole looking at the back of the key. 

• The black keys on the other hand have the extrusions 
on the lower left hole looking at the back of the key. 




Step 14 

• Use the pictures shown here as guides for 
where the keys should go if the keys fell out 
or you simply chose to remove them. 



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Managing Texas Instruments TI-92 Keyboard 



To reassemble your device, follow these instructions in reverse order. 



This document was last generated on Dec 14, 2010. 



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